I don't know what's wrong, but even when my computer is running only 3 or 4 programs I the whole system lags when growl updates (to the point where iTunes stops playing for 2-3 seconds) or when I load up a page in firefox. I don't know why this could be, I have an almost clean system running mostly all Apple processes. The other point is that my VM total is 40 gigabytes. I've searched for people with tons of virtual memory problems and the worst I could find is someone with a 13GB VM. The problem is that when the system hangs, nothing is using more than 5% of my processor.